TFSeven 5 Pcs Brand New LED Badminton Shuttlecock Dark Night Glow Birdies Lighting For Indoor Sports Activities (Blue Light) Touch switch lights, IC control.Economical shuttlecocks for beginners and amateurs. This LED badminton is perfect for night play and just makes badminton even more fun. LED lights installed in the back of the cork, with On/Off push button. This light-up birdies are very bright and durable,and the batteries can last 20 hours. Material: goose feather, feather, SMD lamps, Electronic products.